Renesas 70V05L15JG8

Overview

70V05L15JG8 from IDT (now Renesas) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 15 ns maximum access time (commercial grade), 380 mW typical active power, and integrated port arbitration logic. It enables simultaneous read/write access to the same memory location in real-time control systems requiring deterministic inter-processor communication.

For engineers reviewing the 70V05L15JG8 datasheet, 70V05L15JG8 pinout, 70V05L15JG8 application, or 70V05L15JG8 equivalent, key selection criteria include dual-port contention resolution via BUSY/INT flags, on-chip semaphore support for eight concurrent locks, and master/slave cascading capability for 16-bit+ data bus expansion without external logic.

Technical Context

The 70V05L15JG8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling independent read/write cycles without internal synchronization overhead. Its arbitration logic resolves port conflicts using address-match detection and BUSY flag assertion, with configurable master/slave mode via the M/S pin.

It integrates full hardware semaphore signaling across both ports-eight dedicated flags addressed by A0–A2-with atomic set/clear operations. The device supports interrupt generation (INTL/INTR) on write-to-specific-address events and includes automatic power-down via CE-controlled standby mode (660 µW typical).

Key Specifications

Pinout & Package

70V05L15JG8 is housed in a 64-pin thin quad flatpack (TQFP, package code PNG64), measuring 14 mm × 14 mm × 1.4 mm. All VDD pins require local 3.3 V decoupling; all VSS pins must be connected to ground plane for signal integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C024AV-15AXC and IDT70V25L15PF8, the 70V05L15JG8 uniquely combines 8-bit dual-port operation, master/slave cascading, and full hardware semaphore support in a compact 64-pin TQFP - making it optimal for space-constrained, multi-CPU embedded systems requiring fine-grained resource locking.

Availability

70V05L15JG8 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive ECU synchronization modules, and high-speed test equipment requiring stable component supply across extended production lifecycles.

Supply support for 70V05L15JG8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

IDT (Integrated Device Technology), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory, and interface solutions for high-performance computing and real-time embedded systems.

The 70V05L15JG8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial control, telecommunications infrastructure, and test instrumentation.

FAQ

What is the maximum operating frequency supported by the 70V05L15JG8?

The 70V05L15JG8 supports a maximum read cycle rate of 66.7 MHz, derived from its 15 ns access time (tAA). This is achievable under commercial temperature conditions (0°C to +70°C) with 3.3 V ± 0.3 V supply and proper signal integrity layout. The device does not specify a clock input; timing is fully asynchronous and governed by CE, OE, and R/W setup/hold constraints per the AC Electrical Characteristics table.

Does the 70V05L15JG8 support true simultaneous read/write to the same memory address?

Yes, the 70V05L15JG8 supports true simultaneous read/write to the same memory location across its independent left and right ports. Its dual-port cell architecture ensures no internal contention, and the BUSY flag only asserts during write-write collisions - not read-write - preserving deterministic latency for real-time data exchange in the 70V05L15JG8.

How does the master/slave (M/S) configuration affect BUSY pin behavior in the 70V05L15JG8?

When M/S = VIH, the 70V05L15JG8 operates as a master: BUSYL and BUSYR become push-pull outputs that assert low during arbitration conflicts. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs used to inhibit writes when the opposing port asserts BUSY - enabling daisy-chained multi-device systems without external logic.

Can the 70V05L15JG8 be used in industrial temperature applications?

No - the 70V05L15JG8 is rated for commercial temperature range only (0°C to +70°C). For industrial applications (−40°C to +85°C), IDT specifies the 70V05S variant (e.g., 70V05S20JG8, 20 ns speed). The 'L' suffix in 70V05L15JG8 explicitly denotes commercial-grade speed/power optimization, and its DC/AC parameters are not characterized for extended temperature operation.

What is the purpose of the SEM pins on the 70V05L15JG8, and how are they used?

The SEML and SEMR pins on the 70V05L15JG8 enable access to the on-chip semaphore register file instead of the main memory array. When SEM = VIH and CE = VIL, the device operates as standard SRAM; when SEM = VIL and CE = VIH, I/O0–I/O7 map to eight semaphore flags addressed by A0–A2 - providing hardware-accelerated mutual exclusion for multi-threaded firmware running on either port of the 70V05L15JG8.